Demographics & People — Marissa, Illinois
Population Overview
| Population (Census) | 1,133 |
|---|
| Estimated 2026 | ~1,500 |
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| Median Age | 42.9 |
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| Total Households | 585 |
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| Family Households | 299 |
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| Average Household Size | 1.94 |
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| Diversity Index | 0.0807 (relatively homogeneous) |
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Race & Ethnicity
| White | 955 |
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| Black or African American | 0 |
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| Asian | 0 |
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| Hispanic or Latino | 42 |
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Heritage & Ancestry
| Group | Count |
|---|
| German | 382 |
| Unclassified or not reported | 350 |
| Other groups | 279 |
| Irish | 141 |
| English | 106 |
| American | 86 |
| Hispanic: Mexican | 38 |
| Hispanic: Hispanic or Latino | 38 |
| French (except Basque) | 31 |
| Dutch | 16 |
Language
| English Only | 1,108 |
|---|
| Spanish | 3 |
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| Population 5+ | 1,119 |
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Veterans
| Veterans | 105 |
|---|
| Population 18+ | 1,024 |
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Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Marissa, Illinois.
